Valve-gearing for internal-combustion engines.



H. W. BOLENS. VALVE GEARING FOR INTERNAL COMBUSTION ENGINES. APPLIUATIONFILED JUNE 28, 1912.

1,089,526, Patented Mar. 10, 191;

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HARRY W. BOLENS,

OF PORT WASHINGTON, WISCONSIN.

VALVE-GEARING FOR INTERNAL-COMBUSTION ENGINES.

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To all whom it may concern:

Be it known that T, HARRY W. BoLENs, a citizen of the United States, andresident of Port Washington, in the county of Ozaukee and State ofWisconsin, have invented certain new and useful Improvements inValve-Gearing for Internal-Combustion Engines; and I do hereby declarethat the following is a full, clear, and exact description thereof.

My invention refers to internal combustion engines of the hit and misstype, 1ts object being to provide simple, positive and effectivegovernor-controlled valve-gear therefor.

1n engines of the above mentioned type it is usual to employ agovernor-controlled sleeve that is mounted upon the engine crank-shaftand is moved longitudinally thereupon by its governor connection. A hitor miss engagement between a valve-rod and an interposed member isdependent upon the position of the sleeve and the exhaust valve may beheld open to thus break the vacuum upon the suction stroke of thepiston, whereby a gas charge is skipped, this operation being governedby the speed and load conditions to which the engine is subjected.

The specific object of my invention is to provide an oscillatory armhaving a tappet at its free end, which tappet is adapted to limitreciprocative motion of the valve-rod in one direction, said arm beingoscillated through movement of the valve -sleeve whereby its tappet iscaused to travel in or out of the lineal path of travel of thevalve-rod.

With the above objects in view the invention consists in certainpeculiarities of 0011- struction and combination of mechanical elementsas hereinafter set forth with. reference to the accompanying drawingsand subsequently claimed.

Tn the drawings Figure 1 represents a plan view, partly in horizontalsection, of a fragment of an internal combustion en gine andvalve-gearing therefor embodying the features of my invention; Fig. 2,an ele vation of the same partly in section, the section being indicatedby line 2-2 of Fig. 1, and Fig. 3, a detailed rear face view of thevalve-rod head showing a tappet-plate in connection therewith and meansfor adjusting the same.

Referring by characters to the drawings,

Specification of Letters Patent.

Application filed June 28, 1912.

Patented Man 10, 1914. Serial No. 706,450.

1 represents a fragment of an engine bed provided with a journal-box 2for the reception of an engine crank-shaft 3.

4 represents a fragment of the usual spring-controlled reciprocativevalve-rod, the rear end of which is arranged to actuate the exhaustvalve not shown. The forward end of the valve-rod terminates with aforked head 5, the tangs of which straddle the outer projecting end ofan arbor 6. The arbor is journaled in the bearing 6 that forms part ofthe engine-bed, and serves as a support and guide for said valve-rod.The forked end of the valve-rod is held against lateral play upon thearbor end, between a valvecam 7 and an ignition timing cam 7 both ofwhich cams are secured to the arbor and arranged to abut the side facesof the valverod head. The arbor has also secured thereto the usualgear-wheel S that meshes with a pinion 9 carried by the enginecrank-shaft 3, the said gearing constituting the usual drive mechanismfor the spark timing cams. The valve-rod head also carries anantifriction roller 10 that is arranged to engage the valvecam 7 wherebypositive thrust of said valve-rod in opposition to a spring 4: is had,during each valve movement.

One of the valve-rod head tangs has an apertured car 11 extendingtherefrom for the reception of a hardened metallic tappetplate 12,. thesame being adjustably secured to said ear by a retaining bolt 13 thatpasses through the ear aperture, which aperture is elongated, and acorresponding circular aperture in the tappet-plate. The rear edge ofthe tappet-plate 12 is arranged to abut the end of an adjusting screw 14which screw is in threaded union with a web extension of the ear 11.This screw permits adjustment in or out of the tappet-plate 12, theretaining bolt being thereafter confined by a suitable locknut.

The engine crank-shaft 3 carries the usual fly-wheel 15 provided with acentrifugal governor 16 in the form of a bell-crank. One arm 16 of thebell-crank is provided with a pin or stud that engages an annular groove18 of a sleeve 19, the latter being loosely mounted upon saidcrank-shaft and is also provided with a second annular groove 18, whichgroove constitutes means for i1nparting oscillatory movement to apivoted arm 20. The arm 20 extends over and beyond the crankshaft andcarries a roller stud :21 that engages the annular groove 18 of thegovernor-controlled sleeve. The free end of the arm 20 is provided witha rectangular shouldered seat 22 for the reception of a tappet-plate 23,which tappet-plate is held to the arm-seat by a countersunk headed bolt23, the bolt being retained by a suitable nut that enga es the rear faceof the arm and is in threaded union with said bolt. The arm tappet-plateand valve-rod tappetplate are disposed upon the same horizontal planewhereby they abut each other as the arm tappet is moved into the path oftravel of the rod in one direction, whereby travel of said rod ischecked. Thus if the cam 7 has tnrust the rod rearward to effect a valveopening movement and at this time, should the tappet of the oscillatoryarm be brought into alinement with the valve-tappet, return movement ofthe valve -rod would be checked, whereby the valve is held open. Henceit is apparent that when the speed of the engine is accelerated to apredetermined degree that the arm tappet will be moved to a positionwhereby the exhaust valve is held open and during the succeed ing cycleof the engine there will be no admission of a gas charge. The valve-rodt also carries an insulated spring terminal 7 which is adapted to engagethe ignition cam 7 whereby the spark circuit is closed, this mechanismforming no part of my invention.

Attention is called to the fact that the head of the valve-rod being inthe form of a fork, the assemblage of the device is facilitated and thusthe valve-rod can readily be placed in position without the removal ofparts or box attachments, which, under ordinary conditions are necessaryin order to supply the proper guides for said rod.

1 claim:

1. In an internal combustion engine having a bed, a shaft journaledtherein, a valverod provided with a head in juxtaposition to the shaft,a governor-controlled grooved sleeve reciprocatively mounted upon theshaft, and a tappet-plate carried by the valve-rod head; the combinationof a ver tically disposed pin extending from the engine bed, anoscillatory arm mounted upon the pin, the arm being extended crosswiseover the sleeve and having its free end disposed upon the opposite sideof said sleeve from that of its fulcrum point, a stud extending fromsaid arm intermediate of its length engageable with the sleeve groove, atappetplate secured to the free end of the aforesaid arm, thetappet-plate being arranged to oscillate across the line of travel ofthe valve head tappet, whereby the latter is engaged incidental topredetermined acceleration of the engine.

2. In an internal combustion engine having a bed, a shaft journaledtherein, a valverod provided with a head in juxtaposition to the shaft,a governor-controlled grooved sleeve reciprocatively mounted upon theshaft, and a tappet-plate carried by the valve-rod head; the combinationof an oscillatory arm in pivotal union with the engine bed, the armbeing extended crosswise of the sleeve and having its free end disposedupon the opposite side of said sleeve from that of its point ofoscillation, a stud extending from the arm intermediate of its lengthengageable with the sleeve groove, a tappetplate carried at the free endof said arm, the tappet-plate being in alinement with the valve-rodtappet-plate whereby movement of said valve-rod is checked in onedirection.

3. In an internal combustion engine having a bed, a shaft journaledtherein, a valverod provided with a head in juxtaposition to the shaft,:3. governor-controlled grooved sleeve reciprocatively mounted upon theshaft, and a tappet-plate carried by the valve-rod head; the combinationof an oscillatory arm in pivotal union with the engine bed, the armbeing extended crosswise of the sleeve and having its free end disposedupon the opposite side of said sleeve from that of its point ofoscillation, a roller stud extending from the arm intermediate of itslength engageable with the sleeve groove, a tappet-plate carried at thefree end of said arm, the tappet-plate being in alinement with thevalve-rod tappet-plate whereby movement of said valve rod is checked inone direction.

at. In an internal combustion engine having a bed, a crank-shaftjournaled therein, a valve-rod provided with a head in juxtaposition toone side of the shaft, a tappetplate carried by the head, and agovernorcontrolled grooved sleeve reciprocatively mounted upon saidshaft; the combination of a vertically disposed pin extending from theengine bed upon that side of the shaft opposite the valve-rod head, anarm pivotally mounted upon the pin, the arm being extended crosswise or"the sleeve and having its free end disposed upon the opposite side ofsaid sleeve from that of its point of oscillation, a rectangulartappet-seat at its free end, the tappet-seat being upon the samehorizontal plane as the valve-rod tappet, and means depending from thearm intermediate of its length for engagement with the sleeve groovewhereby the free end of said arm is caused to move in or out of the pathof travel of the valve-rod tappet.

5. An internal combustion engine comprising a bed, a crank-shaftjournaled therein, an arbor in gear connection with the crank-shaft, aspring-controlled reciprocative valve-rod, a forked head carried by thevalve-rod engageable with the arbor, an ear extending from the head, atappet-plate secured to the ear, a governor-controlled grooved sleevereciprocatively mounted upon said arm is oscillated when the sleeve ismoved under control of the governor.

In testimony that I claim the foregoing I have hereunto set my hand atMilwaukee, 15 in the county of Milwaukee and State of WVisconsin in thepresence of two witnesses.

HARRY W. BOLENS.

the crank-shaft, a pivot-pin extending upwardly from the engine bed, anarm having one end journaled upon the pivot-pin, the arm being extendedcrosswise over the sleeve and having its free end disposed upon theopposite side of said sleeve from that of its point of oscillation, atappet carried at the free end of the arm for engagement with thevalve-rod head tappet, and a stud extending from the arm intermediate ofits ends engageable with the sleeve groove whereby v Witnesses:

M. E. DOWNEY, GEO. W. YOUNG.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

